APA (7th ed.) Citation

Laurel, R. S., Melchor, M., & De Ocampo, M. G. (1992). My first book of "o" words: A sound foundation approach for beginning readers. Bookmark Inc.

Chicago Style (17th ed.) Citation

Laurel, Rayla S., Merci Melchor, and Maricar G. De Ocampo. My First Book of "O" Words: A Sound Foundation Approach for Beginning Readers. Makati, Metro Manila: Bookmark Inc, 1992.

MLA (9th ed.) Citation

Laurel, Rayla S., et al. My First Book of "O" Words: A Sound Foundation Approach for Beginning Readers. Bookmark Inc, 1992.